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Novel Hydroxyl-Functional Aliphatic COsub.2-Based Polycarbonates: Synthesis and Properties
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Novel Hydroxyl-Functional Aliphatic COsub.2-Based Polycarbonates: Synthesis and Properties
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Journal Article
Novel Hydroxyl-Functional Aliphatic COsub.2-Based Polycarbonates: Synthesis and Properties
2025
Overview
A series of novel functional polycarbonates, specifically poly(solketal glycidyl ether carbonate-co-propylene carbonate)s with varying compositions, were synthesized through the ring-opening copolymerization of solketal glycidyl ether, propylene oxide, and carbon dioxide. The reaction was catalyzed by rac-(salcy)Co[sup.III]X complexes with bis(triphenylphosphine)iminium salts as co-catalysts, achieving high selectivity. The resulting terpolymers exhibited number-average molecular weights ranging from 2 × 10[sup.4] to 1 × 10[sup.5] and a narrow, bimodal molecular weight distribution, with dispersities of 1.02–1.07 for each mode. Interestingly, the addition of a small amount of water to the reaction mixture yielded a terpolymer with a unimodal molecular weight distribution and a dispersity of 1.11. Subsequent acidic hydrolysis of the solketal protective groups produced poly(glyceryl glycerol carbonate-co-propylene carbonate). All terpolymers were amorphous, with Tg near or below room temperature. The hydroxyl-functional polycarbonates underwent cyclodepolymerization under milder conditions compared to polycarbonates with protected hydroxyl groups.
Publisher
MDPI AG
Subject
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